An accent isn’t a dialect though. A dialect of English uses non-native words and phrases. Gennel is not an English word, nor is buffet, or thisen. “Thisen” is not just a shortening/corruption of “yourself” or even “thyself”, and “Ayup”, like many Broad Yorkshire words, derives from Old Norse and has no English counterpart. A native Englsh speaker would not understand those words, and would be completely lost when faced with such words unless they had been exposed to Broad Yorkshire or taught the translation.